I recently purchased a 2015 Tuscon and I love it, however during a heavy rain fall the battery dies. I have replaced the battery but it still happens. It boosts easily and then starts again, no problem, once the battery has charged. The garage cannot find the issue. I believe, after some internet research it may be that moisture is getting somewhere and shorting out the battery. What should I be looking for, and how do I get the garage to take me seriously. (I am a woman so I get eye rolls when I tell them what I think the issue might be). Any help would be appreciated.

 

This is something you can check.
Take a look at the rear window wiper, does it appear to be in the right position when off ?

If it cannot get to the normal park position it will keep trying until the battery goes dead.

 

Thank you I will check this.

 

I have some more questions.

If you use the vehicle and it is not or was not raining , any problem?

Do you leave the remote in or near the vehicle when raining , ?

How would you describe heavy rain?
Are there any accessories left in the vehicle when parked ,phone , etc?
Has any other accessory been added to your vehicle?
Certain things need to be ruled out before attempting to narrow down some possibilities, thank you.

 

Thank you for responding

At all other times the car runs great. Not sure what you mean by remote, but the key fob is not left in the car, but it does have a remote start (I believe it is a Hyundai remote start)

Usually the rain is quite heavy, large puddles. I do not believe there are any aftermarket additions to the vehicle. No phones or other items left in the vehicle.

Note with the remote start, it is a separate fob and if the remote start is used i can only open the doors with the remote start fob.

I hope this is enough information.

 

If your vehicle is driven in light rain, does it still cause the battery to run down?

Some charging systems will turn the charge light off , but still not put out enough to keep the battery charged.
We are groping for causes and until some electrical checks can be done, we are just guessing and that doesn't help much.

 

No the car runs fine in light rain.

I have arranged with the garage to have it towed instead of jumping it. I do have a question though. Everything I have read talks about exposed wires. I know nothing about cars but there is a wire by the battery that looks like the protective cover has broken. I have attached a picture could this be the issue.

 

I wouldn't think so, however, there is considerable corrosion at the battery post connection and if the charging system cannot get the charge to the battery the battery will not get charged , but the vehicle will run until shut down.
One of the basic things is to make sure the connections at the battery are clean and tight.

 

Will do thank you

 

+_ Check for a broken grounding strap at the botom of the car. Google it. Not specific to Hyundai, but to all vehicles. Google it, Rusted +grounding strap